Title (en)

COLD REDUCED NON-AGING DEEP DRAWING STEEL AND METHOD FOR PRODUCING

Publication

EP 0510249 A3 19930908 (EN)

Application

EP 91114828 A 19910903

Priority

• US 69014291 A 19910423
• US 72096691 A 19910625

Abstract (en)

[origin: EP0510249A2] A cold reduced, non-aging, aluminum killed steel characterized by an elongated grain structure and having an rm value at least 1.8 produced from a slab having a reduced hot rolling temperature. A slab consisting essentially of </= 0.08% carbon, </= 0.1% acid sol. aluminum, </= 0.2% manganese, all percentages by weight, the balance iron and unavoidable impurities, is hot rolled to a sheet from a temperature less than 1260 DEG C. Preferably, the slab is continuously cast from a melt consisting essentially of 0.03-0.08% acid sol. aluminum, 0.003-0.007% total nitrogen, < 0.20% manganese, wherein % acid sol. aluminum x % total nitrogen is within the range of 1 x 10<-><4> to 5 x 10<-><4> and is hot rolled from a temperature of 1093-1175 DEG C. The hot rolled sheet is descaled, cold reduced, batch annealed and temper rolled. Preferably, the cold reduced sheet is annealed in the range of 538-649 DEG C and the temper rolled sheet has a tensile strength of 284.5-313.9 N/mm<2> (29-32 kg/mm<2>), a total elongation of at least 42% and an rm value of at least 2.0.

IPC 1-7

C21D 8/04

IPC 8 full level

C21D 8/04 (2006.01)

CPC (source: EP)

C21D 8/0426 (2013.01)

Citation (search report)

• [XD] US 4473411 A 19840925 - HOOK ROLLIN E [US], et al
• [AD] US 4145235 A 19790320 - GONDO HISASHI, et al
• [AD] US 4478649 A 19841023 - AKISUE OSAMU [JP], et al
• [AD] US 4698102 A 19871006 - MARUOKA KUNIAKI [JP], et al
• [AD] US 4116729 A 19780926 - KATOH HIROSHI, et al
• [AD] US 4627881 A 19861209 - KAWANO TSUYOSHI [JP], et al
• [AD] US 3798076 A 19740319 - SUEMUNE K, et al
• [AD] US 3959029 A 19760525 - MATSUDO KAZUO, et al
• [A] ISIJ INTERNATIONAL, vol. 30, no. 9, 1990, TOKYO,JP pages 764 - 772 K.USHIODA ET AL.

Designated contracting state (EPC)

AT BE DE ES FR GB IT NL SE

DOCDB simple family (publication)

EP 0510249 A2 19921028; EP 0510249 A3 19930908; EP 0510249 B1 20000308; AT E190359 T1 20000315; DE 69132028 D1 20000413; DE 69132028 T2 20000928; ES 2144396 T3 20000616

DOCDB simple family (application)

EP 91114828 A 19910903; AT 91114828 T 19910903; DE 69132028 T 19910903; ES 91114828 T 19910903